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    • 5. 发明授权
    • Program/erase selection for flash memory
    • FLASH存储器的程序/擦除选择
    • US5053990A
    • 1991-10-01
    • US157361
    • 1988-02-17
    • Jerry A. KreifelsAlan BakerGeorge HoekstraVirgil N. KynettSteven WellsMark Winston
    • Jerry A. KreifelsAlan BakerGeorge HoekstraVirgil N. KynettSteven WellsMark Winston
    • G11C17/00G06F12/00G11C16/02G11C16/10G11C16/16G11C16/34G11C29/00G11C29/14
    • G11C16/3445G11C16/10G11C16/16G11C16/3436G11C16/3459
    • A semiconductor flash EPROM/EEPROM device which includes a command port for receiving instruction on a data line and providing control signals to a memory for providing program and erase functions, a method to program and erase the memory. A program sequence is comprised of setting up a program command during a first write cycle, preforming a second write cycle to load address to address register and data to to a data register, programming during a program cycle and writing a program verify command during a third write cycle to verify the programmed data during a read cycle. An erase sequence is comprised of writing a setup erase command during a first write cycle, an erase command during a second write cycle providing the erasure during an erase cycle, writing the erase verify command during a third write cycle which also addresses the address of the memory and providing erase verification during a read cycle. Both the erase and program cycles provide for measured incremental erasing and programming.
    • 一种半导体闪存EPROM / EEPROM器件,包括用于在数据线上接收指令并向存储器提供控制信号以提供编程和擦除功能的命令端口,编程和擦除存储器的方法。 程序序列包括在第一写周期期间设置程序命令,执行第二写周期以将地址寄存器加载到地址寄存器和数据到数据寄存器,在程序周期期间进行编程以及在第三写入期间写入程序验证命令 写周期以在读周期中验证编程数据。 擦除序列包括在第一写周期期间写入建立擦除命令,在擦除周期期间提供擦除的第二写周期期间的擦除命令,在第三写周期期间写入擦除验证命令,该第三写周期还解决 存储器并在读周期期间提供擦除验证。 擦除和编程周期都提供测量的增量擦除和编程。
    • 6. 发明授权
    • Nonvolatile memory with blocks and circuitry for selectively protecting
the blocks for memory operations
    • 具有用于选择性地保护块以用于存储器操作的块和电路的非易失性存储器
    • US5513136A
    • 1996-04-30
    • US358978
    • 1994-12-19
    • Mickey L. FandrichVirgil N. KynettSalim B. FedelThomas C. Price
    • Mickey L. FandrichVirgil N. KynettSalim B. FedelThomas C. Price
    • G11C7/24G11C16/22G11C16/06
    • G11C7/24G11C16/22
    • A nonvolatile memory comprises a memory array and a control circuit coupled to the memory array for performing memory operations with respect to the memory array. A storage circuit associated with the memory array is provided for storing a data. When the data is stored in the storage circuit, the memory array is locked from being accessed for the memory operations. A logic circuit is coupled to the control circuit and the storage circuit for preventing the control circuit from accessing the memory array with respect to the memory operations in accordance with the data. The logic circuit prevents the control circuit from accessing the memory array when the storage circuit stores the data. A control input is provided for receiving a control signal. The control signal is applied to the logic circuit and can be in a first voltage state and a second voltage state. When the control signal is in the first voltage state, the logic circuit is enabled to lock the memory array with respect to the memory operations in accordance with the data stored in the storage circuit. When the control signal is in the second voltage state, the logic circuit is disabled to lock the memory array and the memory array is allowed for the memory operations regardless of the data stored in the storage circuit.
    • 非易失性存储器包括存储器阵列和耦合到存储器阵列的控制电路,用于执行存储器阵列的存储器操作。 提供与存储器阵列相关联的存储电路用于存储数据。 当数据存储在存储电路中时,存储器阵列被锁定以进行存储器操作。 逻辑电路耦合到控制电路和存储电路,用于根据数据防止控制电路相对于存储器操作访问存储器阵列。 当存储电路存储数据时,逻辑电路防止控制电路访问存储器阵列。 提供控制输入用于接收控制信号。 控制信号被施加到逻辑电路并且可以处于第一电压状态和第二电压状态。 当控制信号处于第一电压状态时,逻辑电路能够根据存储在存储电路中的数据相对于存储器操作锁定存储器阵列。 当控制信号处于第二电压状态时,无论存储在存储电路中的数据如何,逻辑电路被禁用以锁定存储器阵列,并且存储器阵列被允许用于存储器操作。
    • 7. 发明授权
    • Circuitry and method for programming and erasing a non-volatile
semiconductor memory
    • 用于编程和擦除非易失性半导体存储器的电路和方法
    • US5448712A
    • 1995-09-05
    • US201044
    • 1994-02-24
    • Virgil N. KynettMickey L. Fandrich
    • Virgil N. KynettMickey L. Fandrich
    • G11C17/00G06F12/00G11C16/02G11C16/10G11C16/34G11C7/00
    • G11C16/3445G11C16/102G11C16/3436G11C16/3459
    • Erase control circuitry for erasing a flash memory array. The erase control circuitry resides on the same substrate as the flash memory array, along with a command state machine. The command state machine recognizes and externally generated erase command applied to the terminals and generates an active erase control signal, to which the erase control circuitry responds. The erase control circuitry includes precondition pulse application circuitry, erase pulse application circuitry and erase verification circuitry. The precondition pulse application circuitry preconditions the array by programming each bit in the flash memory to a threshold voltage level representative of a programmed state. The erase pulse application circuitry applies a single erase pulse at a time to the flash memory array to erase the flash array by bringing the threshold voltage level of each cell in the array to a level representative of an erased state. The erase verification circuitry verifies the erasure of the flash memory array on a byte by byte basis. If the byte currently being verified has been erased; the erase verification circuitry brings a match signal to an active level. The erase control circuitry determines whether additional erase pulses should be applied to the flash array based upon the match signal and the number of erase pulses previously applied to the flash array described is program control circuitry and methods of programming and erasing a flash memory array in response to two step command sequences.
    • 擦除控制电路以擦除闪存阵列。 擦除控制电路与命令状态机一起位于与闪存阵列相同的衬底上。 命令状态机识别并向外部产生的擦除命令,并产生一个有效的擦除控制信号,擦除控制电路对其进行响应。 擦除控制电路包括预处理脉冲应用电路,擦除脉冲应用电路和擦除验证电路。 预处理脉冲应用电路通过将闪速存储器中的每个位编程为表示编程状态的阈值电压电平来预先调整阵列。 擦除脉冲施加电路通过将阵列中的每个单元的阈值电压电平提升到表示擦除状态的电平,将一次擦除脉冲一次施加到闪存阵列以擦除闪存阵列。 擦除验证电路以逐个字节为基础来验证闪速存储器阵列的擦除。 如果当前正在验证的字节已被擦除; 擦除验证电路将匹配信号带到活动电平。 擦除控制电路基于匹配信号确定是否应该向闪存阵列施加额外的擦除脉冲,并且先前施加到所述闪存阵列的擦除脉冲的数量是程序控制电路以及响应于编程和擦除闪存阵列的方法 到两步命令序列。